1229381136 has 60 divisors (see below), whose sum is σ = 3551558400. Its totient is φ = 396573120.

The previous prime is 1229381099. The next prime is 1229381177. The reversal of 1229381136 is 6311839221.

It is a super-2 number, since 2×1229381136² = 3022755955105300992, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 1229381136.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 133236 + ... + 142163.

It is an arithmetic number, because the mean of its divisors is an integer number (59192640).

Almost surely, 2^1229381136 is an apocalyptic number.

1229381136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1229381136 is an abundant number, since it is smaller than the sum of its proper divisors (2322177264).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1229381136 is a wasteful number, since it uses less digits than its factorization.

1229381136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275444 (or 275435 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 1229381136 is about 35062.5317967770. The cubic root of 1229381136 is about 1071.2615440355.

The spelling of 1229381136 in words is "one billion, two hundred twenty-nine million, three hundred eighty-one thousand, one hundred thirty-six".